decessus

Hi guys, I am working on a webshop application and I kind of got stuck making my shopping cart. I want to save the products users order by using sessions. Once the user clicked 'order', 2 vars should be saved, one called 'id' and the other called 'count'. ID will be read out of $_GET['id'], and count will have a standard number, '1'. (Users will be able to change this amount later). I have no clue how to save multiple vars in a session, and later print em. I think I have to use a for loop, but since I am pretty new at using sessions; and most of the stuff I read is either outdated or wrong (might be me though ;)), I ask you for your help. Thanks in advance, -Dec